First report of Erysiphe quercicola S. Takam. &amp; U. Braun in Quercus robur Linnaeus in Brazil

Piveta, Graziela; Marcolin, Giovanna; Garcia, Flávio Augusto de Oliveira

doi:10.1590/0100-5405/169644

Cited by 6 publications

(3 citation statements)

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“…Recently, a taxonomic study based on morphological and molecular characteristics reported the occurrence of E. quercicola causing powdery mildew in cashew trees in Brazil (Cardoso et al ., ), while it had already been reported as the cause of epidemics in Tanzania (Limkaisang et al ., ). This species had also been reported to cause powdery mildew in flamboyant trees ( Delonix regia ), rubber trees ( Hevea brasiliensis ), camphor trees ( Cinnamomum camphora ) and oaks ( Quercus robur ) in Brazil (Limkaisang et al ., ; Dallagnol et al ., ; Dorneles et al ., ; Piveta et al ., ). Nevertheless, previous studies (Honorato et al ., ) have shown morphological differences in the shapes and sizes of conidiophores and conidia between the original powdery mildew described in Brazil (Noack, ) and the one that has been newly discovered (Cardoso et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Morphological, molecular phylogenetic and pathogenic analyses of Erysiphe spp. causing powdery mildew on cashew plants in Brazil

et al. 2019

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Cashew powdery mildew is presently the most important disease of cashew trees in all Brazilian growing regions. Although it was described over a century ago, it had never threatened the Brazilian cashew industry until the first decade of the 21st century. Morphological and pathogenic evidence indicated the possibility of different pathogen species being involved in early and late types of cashew powdery mildew. This study was designed to elucidate this issue by comparing two different powdery mildew fungi occurring on cashew plants in Brazil according to the morphological characteristics, phylogenetic relationships with closely related powdery mildew fungi and pathogenic relationships. Based on morphology, molecular phylogenetics and pathogenicity on cashew, it was shown that two species of powdery mildew specimens are without question associated with cashew trees. One species, which infects young immature tissues such as shiny leaves, flowers and young fruits, is Erysiphe quercicola, while Erysiphe necator is associated exclusively with mature leaves. This is the first report of both E. quercicola and E. necator causing cashew powdery mildew, and the first detection of E. necator on cashew.

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Section: Discussionmentioning

confidence: 97%

Morphological, molecular phylogenetic and pathogenic analyses of Erysiphe spp. causing powdery mildew on cashew plants in Brazil

et al. 2019

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“…In recent years, new hosts of E . quercicola have been reported such as cashew, flamboyant tree ( Delonix regia ), rubber tree ( Hevea brasiliensis ), camphor ( Cinnamomum camphora ) and oak ( Quercus robur ) in Brazil (Cardoso et al, 2017; Dallagnol et al, 2012; Dorneles et al, 2018; Limkaisang et al, 2005; Piveta et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“… a 1, Takamatsu et al (2015); 2, Cardoso et al (2017); 3, Piveta et al (2018); 4, Dallagnol et al (2012); 5, Dorneles et al (2018); 6, Siahaan et al (2016); 7, Takamatsu et al (2015); 8, Takamatsu et al (2007); 9, Fonseca et al (2016). …”

Section: Methodsmentioning

confidence: 99%

Alternative hosts of Erysiphe quercicola in the Brazilian cashew ecosystem

et al. 2022

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Powdery mildew is currently the most important disease of the cashew plant across all producing regions of Brazil. A recent study reported the occurrence of Erysiphe quercicola as the causal agent of the symptoms on leaves, inflorescences, pseudofruits and kernels. Morphological evidence raised the question of whether different hosts of the fungus occur in areas near to cashew orchards. This study was developed to compare the fungi that cause powdery mildew in plants in the cashew ecosystem in order to understand the host relationships, and raising the possibility that alternative hosts are involved in the epidemics verified in the cashew tree. The work consisted of collecting samples of plants with symptoms of powdery mildew and carrying out morphological, phylogenetic and cross‐pathogenicity analysis of the fungal pathogens. The results of this characterization showed that annatto (Bixa orellana), sombrero (Clitoria fairchildiana) and mango (Mangifera indica) are possible alternative hosts of E. quercicola pathogenic to cashew and can therefore represent a source of inoculum for cashew powdery mildew. In addition, the occurrence of this pathogen in mango in Brazil was identified for the first time.

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